diff --git a/.changes/msrv-1.77.2.md b/.changes/msrv-1.77.2.md
new file mode 100644
index 000000000000..3bb939f48dac
--- /dev/null
+++ b/.changes/msrv-1.77.2.md
@@ -0,0 +1,16 @@
+---
+"tauri": patch:changes
+"tauri-utils": patch:changes
+"tauri-runtime": patch:changes
+"tauri-runtime-wry": patch:changes
+"tauri-codegen": patch:changes
+"tauri-macros": patch:changes
+"tauri-plugin": patch:changes
+"tauri-build": patch:changes
+"tauri-cli": patch:changes
+"tauri-macos-sign": patch:changes
+"tauri-bundler": patch:changes
+"tauri-driver": patch:changes
+---
+
+Downgrade MSRV to 1.77.2 to support Windows.
diff --git a/.github/workflows/test-core.yml b/.github/workflows/test-core.yml
index 9aeca76be1fd..0e0acef62dc4 100644
--- a/.github/workflows/test-core.yml
+++ b/.github/workflows/test-core.yml
@@ -37,35 +37,35 @@ jobs:
           - {
               target: x86_64-pc-windows-msvc,
               os: windows-latest,
-              toolchain: '1.78.0',
+              toolchain: '1.77.2',
               cross: false,
               command: 'test'
             }
           - {
               target: x86_64-unknown-linux-gnu,
               os: ubuntu-latest,
-              toolchain: '1.78.0',
+              toolchain: '1.77.2',
               cross: false,
               command: 'test'
             }
           - {
               target: aarch64-apple-darwin,
               os: macos-14,
-              toolchain: '1.78.0',
+              toolchain: '1.77.2',
               cross: false,
               command: 'test'
             }
           - {
               target: aarch64-apple-ios,
               os: macos-latest,
-              toolchain: '1.78.0',
+              toolchain: '1.77.2',
               cross: false,
               command: 'build'
             }
           - {
               target: aarch64-linux-android,
               os: ubuntu-latest,
-              toolchain: '1.78.0',
+              toolchain: '1.77.2',
               cross: true,
               command: 'build'
             }
@@ -88,6 +88,16 @@ jobs:
           sudo apt-get update
           sudo apt-get install -y webkit2gtk-4.1 libxdo-dev libayatana-appindicator3-dev
 
+      - name: downgrade crates with MSRV conflict
+        run: |
+          cargo update -p ravif --precise 0.11.5
+          cargo update -p aws-config --precise 1.5.5
+          cargo update -p aws-sdk-ssooidc --precise 1.40.0
+          cargo update -p aws-sdk-s3 --precise 1.46.0
+          cargo update -p aws-sdk-sts --precise 1.39.0
+          cargo update -p aws-sdk-sso --precise 1.39.0
+          cargo update -p bitstream-io --precise 2.3.0
+
       - uses: Swatinem/rust-cache@v2
         with:
           prefix-key: v2
diff --git a/Cargo.lock b/Cargo.lock
index 12700a23220c..7633de1238d5 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -579,9 +579,9 @@ dependencies = [
 
 [[package]]
 name = "aws-config"
-version = "1.5.7"
+version = "1.5.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8191fb3091fa0561d1379ef80333c3c7191c6f0435d986e85821bcf7acbd1126"
+checksum = "4e95816a168520d72c0e7680c405a5a8c1fb6a035b4bc4b9d7b0de8e1a941697"
 dependencies = [
  "aws-credential-types",
  "aws-runtime",
@@ -647,9 +647,9 @@ dependencies = [
 
 [[package]]
 name = "aws-sdk-s3"
-version = "1.52.0"
+version = "1.46.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f571deb0a80c20d21d9f3e8418c1712af9ff4bf399d057e5549a934eca4844e2"
+checksum = "4abf69a87be33b6f125a93d5046b5f7395c26d1f449bf8d3927f5577463b6de0"
 dependencies = [
  "ahash 0.8.11",
  "aws-credential-types",
@@ -682,9 +682,9 @@ dependencies = [
 
 [[package]]
 name = "aws-sdk-sso"
-version = "1.44.0"
+version = "1.39.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0b90cfe6504115e13c41d3ea90286ede5aa14da294f3fe077027a6e83850843c"
+checksum = "11822090cf501c316c6f75711d77b96fba30658e3867a7762e5e2f5d32d31e81"
 dependencies = [
  "aws-credential-types",
  "aws-runtime",
@@ -704,9 +704,9 @@ dependencies = [
 
 [[package]]
 name = "aws-sdk-ssooidc"
-version = "1.45.0"
+version = "1.40.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "167c0fad1f212952084137308359e8e4c4724d1c643038ce163f06de9662c1d0"
+checksum = "78a2a06ff89176123945d1bbe865603c4d7101bea216a550bb4d2e4e9ba74d74"
 dependencies = [
  "aws-credential-types",
  "aws-runtime",
@@ -726,9 +726,9 @@ dependencies = [
 
 [[package]]
 name = "aws-sdk-sts"
-version = "1.44.0"
+version = "1.39.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2cb5f98188ec1435b68097daa2a37d74b9d17c9caa799466338a8d1544e71b9d"
+checksum = "a20a91795850826a6f456f4a48eff1dfa59a0e69bdbf5b8c50518fd372106574"
 dependencies = [
  "aws-credential-types",
  "aws-runtime",
@@ -1167,9 +1167,9 @@ dependencies = [
 
 [[package]]
 name = "bitstream-io"
-version = "2.5.3"
+version = "2.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b81e1519b0d82120d2fd469d5bfb2919a9361c48b02d82d04befc1cdd2002452"
+checksum = "7c12d1856e42f0d817a835fe55853957c85c8c8a470114029143d3f12671446e"
 
 [[package]]
 name = "bitvec"
@@ -4695,7 +4695,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4979f22fdb869068da03c9f7528f8297c6fd2606bc3a4affe42e6a823fdb8da4"
 dependencies = [
  "cfg-if",
- "windows-targets 0.52.6",
+ "windows-targets 0.48.5",
 ]
 
 [[package]]
@@ -4879,6 +4879,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8ea1f30cedd69f0a2954655f7188c6a834246d2bcf1e315e2ac40c4b24dc9519"
 dependencies = [
  "cfg-if",
+ "rayon",
 ]
 
 [[package]]
@@ -6851,15 +6852,16 @@ dependencies = [
 
 [[package]]
 name = "ravif"
-version = "0.11.10"
+version = "0.11.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a8f0bfd976333248de2078d350bfdf182ff96e168a24d23d2436cef320dd4bdd"
+checksum = "bc13288f5ab39e6d7c9d501759712e6969fcc9734220846fc9ed26cae2cc4234"
 dependencies = [
  "avif-serialize",
  "imgref",
  "loop9",
  "quick-error 2.0.1",
  "rav1e",
+ "rayon",
  "rgb",
 ]
 
@@ -10465,7 +10467,7 @@ version = "0.1.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "cf221c93e13a30d793f7645a0e7762c55d169dbb0a49671918a2319d289b10bb"
 dependencies = [
- "windows-sys 0.59.0",
+ "windows-sys 0.48.0",
 ]
 
 [[package]]
diff --git a/Cargo.toml b/Cargo.toml
index 78c7a1f5181b..963894b5910b 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -43,7 +43,7 @@ repository = "https://github.com/tauri-apps/tauri"
 categories = ["gui", "web-programming"]
 license = "Apache-2.0 OR MIT"
 edition = "2021"
-rust-version = "1.78"
+rust-version = "1.77.2"
 
 # default to small, optimized workspace release binaries
 [profile.release]
diff --git a/bench/Cargo.toml b/bench/Cargo.toml
index f3073711c6e9..7b9b36e334cb 100644
--- a/bench/Cargo.toml
+++ b/bench/Cargo.toml
@@ -3,7 +3,7 @@ name = "tauri_bench"
 version = "0.1.0"
 authors = ["Tauri Programme within The Commons Conservancy"]
 edition = "2021"
-rust-version = "1.78"
+rust-version = "1.77.2"
 license = "Apache-2.0 OR MIT"
 description = "Cross-platform WebView rendering library"
 repository = "https://github.com/tauri-apps/wry"
diff --git a/bench/tests/cpu_intensive/src-tauri/Cargo.toml b/bench/tests/cpu_intensive/src-tauri/Cargo.toml
index 94e1a9e62e11..e4471b07a7dd 100644
--- a/bench/tests/cpu_intensive/src-tauri/Cargo.toml
+++ b/bench/tests/cpu_intensive/src-tauri/Cargo.toml
@@ -3,7 +3,7 @@ name = "bench_cpu_intensive"
 version = "0.1.0"
 description = "A very simple Tauri Application"
 edition = "2021"
-rust-version = "1.78"
+rust-version = "1.77.2"
 
 [build-dependencies]
 tauri-build = { path = "../../../../crates/tauri-build", features = [
diff --git a/bench/tests/files_transfer/src-tauri/Cargo.toml b/bench/tests/files_transfer/src-tauri/Cargo.toml
index d21efe6113fb..247a671e3043 100644
--- a/bench/tests/files_transfer/src-tauri/Cargo.toml
+++ b/bench/tests/files_transfer/src-tauri/Cargo.toml
@@ -3,7 +3,7 @@ name = "bench_files_transfer"
 version = "0.1.0"
 description = "A very simple Tauri Application"
 edition = "2021"
-rust-version = "1.78"
+rust-version = "1.77.2"
 
 [build-dependencies]
 tauri-build = { path = "../../../../crates/tauri-build", features = [
diff --git a/bench/tests/helloworld/src-tauri/Cargo.toml b/bench/tests/helloworld/src-tauri/Cargo.toml
index cf2481ff18df..e8d1ad8d9668 100644
--- a/bench/tests/helloworld/src-tauri/Cargo.toml
+++ b/bench/tests/helloworld/src-tauri/Cargo.toml
@@ -3,7 +3,7 @@ name = "bench_helloworld"
 version = "0.1.0"
 description = "A very simple Tauri Application"
 edition = "2021"
-rust-version = "1.78"
+rust-version = "1.77.2"
 
 [build-dependencies]
 tauri-build = { path = "../../../../crates/tauri-build", features = [
diff --git a/crates/tauri-bundler/Cargo.toml b/crates/tauri-bundler/Cargo.toml
index 82b0122fcf28..3f7deffb3ace 100644
--- a/crates/tauri-bundler/Cargo.toml
+++ b/crates/tauri-bundler/Cargo.toml
@@ -11,7 +11,7 @@ keywords = ["bundle", "cargo", "tauri"]
 repository = "https://github.com/tauri-apps/tauri"
 description = "Wrap rust executables in OS-specific app bundles for Tauri"
 edition = "2021"
-rust-version = "1.78"
+rust-version = "1.77.2"
 exclude = ["CHANGELOG.md", "/target", "rustfmt.toml"]
 
 [dependencies]
diff --git a/crates/tauri-cli/Cargo.toml b/crates/tauri-cli/Cargo.toml
index 65e51bb97edd..3165c51739a9 100644
--- a/crates/tauri-cli/Cargo.toml
+++ b/crates/tauri-cli/Cargo.toml
@@ -3,7 +3,7 @@ name = "tauri-cli"
 version = "2.0.0"
 authors = ["Tauri Programme within The Commons Conservancy"]
 edition = "2021"
-rust-version = "1.78"
+rust-version = "1.77.2"
 categories = ["gui", "web-programming"]
 license = "Apache-2.0 OR MIT"
 homepage = "https://tauri.app"
diff --git a/crates/tauri-cli/templates/app/src-tauri/Cargo.crate-manifest b/crates/tauri-cli/templates/app/src-tauri/Cargo.crate-manifest
index 741e7b45ed6c..e7fcaafd3572 100644
--- a/crates/tauri-cli/templates/app/src-tauri/Cargo.crate-manifest
+++ b/crates/tauri-cli/templates/app/src-tauri/Cargo.crate-manifest
@@ -6,7 +6,7 @@ authors = ["you"]
 license = ""
 repository = ""
 edition = "2021"
-rust-version = "1.78"
+rust-version = "1.77.2"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
diff --git a/crates/tauri-cli/templates/plugin/Cargo.crate-manifest b/crates/tauri-cli/templates/plugin/Cargo.crate-manifest
index fd1d14fb28d3..64170c165365 100644
--- a/crates/tauri-cli/templates/plugin/Cargo.crate-manifest
+++ b/crates/tauri-cli/templates/plugin/Cargo.crate-manifest
@@ -4,7 +4,7 @@ version = "0.1.0"
 authors = [ "{{ author }}" ]
 description = ""
 edition = "2021"
-rust-version = "1.78"
+rust-version = "1.77.2"
 exclude = ["/examples", "/webview-dist", "/webview-src", "/node_modules"]
 links = "tauri-plugin-{{ plugin_name }}"
 
diff --git a/crates/tauri-cli/templates/plugin/__example-api/tauri-app/src-tauri/Cargo.crate-manifest b/crates/tauri-cli/templates/plugin/__example-api/tauri-app/src-tauri/Cargo.crate-manifest
index 7468ba4a2730..3dfd82a6ad8e 100644
--- a/crates/tauri-cli/templates/plugin/__example-api/tauri-app/src-tauri/Cargo.crate-manifest
+++ b/crates/tauri-cli/templates/plugin/__example-api/tauri-app/src-tauri/Cargo.crate-manifest
@@ -6,7 +6,7 @@ authors = ["you"]
 license = ""
 repository = ""
 edition = "2021"
-rust-version = "1.78"
+rust-version = "1.77.2"
 
 [lib]
 name = "tauri_app_lib"
diff --git a/crates/tauri-cli/templates/plugin/__example-basic/vanilla/src-tauri/Cargo.crate-manifest b/crates/tauri-cli/templates/plugin/__example-basic/vanilla/src-tauri/Cargo.crate-manifest
index 9b02b15a0cb2..4f854da7bdd4 100644
--- a/crates/tauri-cli/templates/plugin/__example-basic/vanilla/src-tauri/Cargo.crate-manifest
+++ b/crates/tauri-cli/templates/plugin/__example-basic/vanilla/src-tauri/Cargo.crate-manifest
@@ -6,7 +6,7 @@ authors = ["you"]
 license = ""
 repository = ""
 edition = "2021"
-rust-version = "1.78"
+rust-version = "1.77.2"
 
 [lib]
 name = "tauri_app_lib"
diff --git a/crates/tauri-driver/Cargo.toml b/crates/tauri-driver/Cargo.toml
index 61dc4f227e3b..3a91c41504ac 100644
--- a/crates/tauri-driver/Cargo.toml
+++ b/crates/tauri-driver/Cargo.toml
@@ -9,7 +9,7 @@ repository = "https://github.com/tauri-apps/tauri"
 description = "Webdriver server for Tauri applications"
 readme = "README.md"
 edition = "2021"
-rust-version = "1.78"
+rust-version = "1.77.2"
 
 [dependencies]
 anyhow = "1"
diff --git a/crates/tauri-macos-sign/Cargo.toml b/crates/tauri-macos-sign/Cargo.toml
index 1b2b0b8c8aca..00fa57e75f5b 100644
--- a/crates/tauri-macos-sign/Cargo.toml
+++ b/crates/tauri-macos-sign/Cargo.toml
@@ -7,7 +7,7 @@ keywords = ["codesign", "signing", "macos", "ios", "tauri"]
 repository = "https://github.com/tauri-apps/tauri"
 description = "Code signing utilities for macOS and iOS apps"
 edition = "2021"
-rust-version = "1.78"
+rust-version = "1.77.2"
 
 [dependencies]
 anyhow = "1"
diff --git a/examples/api/src-tauri/Cargo.toml b/examples/api/src-tauri/Cargo.toml
index 2ef1b365d86d..a0d8fadc7482 100644
--- a/examples/api/src-tauri/Cargo.toml
+++ b/examples/api/src-tauri/Cargo.toml
@@ -3,7 +3,7 @@ name = "api"
 version = "0.1.0"
 description = "An example Tauri Application showcasing the api"
 edition = "2021"
-rust-version = "1.78"
+rust-version = "1.77.2"
 license = "Apache-2.0 OR MIT"
 
 [lib]
diff --git a/examples/file-associations/src-tauri/Cargo.toml b/examples/file-associations/src-tauri/Cargo.toml
index 7420b5c78387..6f5c6f2f5e7f 100644
--- a/examples/file-associations/src-tauri/Cargo.toml
+++ b/examples/file-associations/src-tauri/Cargo.toml
@@ -3,7 +3,7 @@ name = "tauri-file-associations-demo"
 version = "0.1.0"
 description = "A Tauri application that associate file types"
 edition = "2021"
-rust-version = "1.78"
+rust-version = "1.77.2"
 
 [build-dependencies]
 tauri-build = { path = "../../../crates/tauri-build", features = ["codegen"] }
diff --git a/examples/resources/src-tauri/Cargo.toml b/examples/resources/src-tauri/Cargo.toml
index 24e51fbb6710..5078ed736fd3 100644
--- a/examples/resources/src-tauri/Cargo.toml
+++ b/examples/resources/src-tauri/Cargo.toml
@@ -3,7 +3,7 @@ name = "resources"
 version = "0.1.0"
 description = "A Tauri application that uses Node.js with app resources"
 edition = "2021"
-rust-version = "1.78"
+rust-version = "1.77.2"
 
 [build-dependencies]
 tauri-build = { path = "../../../crates/tauri-build", features = ["codegen"] }