diff --git a/docs/collector.os.md b/docs/collector.os.md
index c5b96b1b..c172d2fa 100644
--- a/docs/collector.os.md
+++ b/docs/collector.os.md
@@ -14,11 +14,11 @@ None
 
 ## Metrics
 
-| Name                                 | Description                                                                                                                                                    | Type  | Labels                                                                                                          |
-|--------------------------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------|-------|-----------------------------------------------------------------------------------------------------------------|
-| `windows_os_hostname`                | Labelled system hostname information as provided by ComputerSystem.DNSHostName and ComputerSystem.Domain                                                       | gauge | `domain`, `fqdn`, `hostname`                                                                                    |
-| `windows_os_info`                    | Contains full product name & version in labels. Note that the `major_version` for Windows 11 is "10"; a build number greater than 22000 represents Windows 11. | gauge | `product`, `version`, `major_version`, `minor_version`, `build_number`, `revision`, `installation_type`         |
-| `windows_os_install_time_timestamp`  | Unix timestamp of OS installation time                                                                                                                         | gauge | None                                                                                                            |
+| Name                                         | Description                                                                                                                                                    | Type  | Labels                                                                                                          |
+|----------------------------------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------|-------|-----------------------------------------------------------------------------------------------------------------|
+| `windows_os_hostname`                        | Labelled system hostname information as provided by ComputerSystem.DNSHostName and ComputerSystem.Domain                                                       | gauge | `domain`, `fqdn`, `hostname`                                                                                    |
+| `windows_os_info`                            | Contains full product name & version in labels. Note that the `major_version` for Windows 11 is "10"; a build number greater than 22000 represents Windows 11. | gauge | `product`, `version`, `major_version`, `minor_version`, `build_number`, `revision`, `installation_type`         |
+| `windows_os_install_time_timestamp_seconds`  | Unix timestamp of OS installation time                                                                                                                         | gauge | None                                                                                                            |
 
 ### Example metric
 
@@ -29,9 +29,9 @@ windows_os_hostname{domain="",fqdn="PC",hostname="PC"} 1
 # HELP windows_os_info Contains full product name & version in labels. Note that the "major_version" for Windows 11 is \\"10\\"; a build number greater than 22000 represents Windows 11.
 # TYPE windows_os_info gauge
 windows_os_info{build_number="19045",installation_type="Client",major_version="10",minor_version="0",product="Windows 10 Pro",revision="4842",version="10.0.19045"} 1
-# HELP windows_os_install_time_timestamp Unix timestamp of OS installation time
-# TYPE windows_os_install_time_timestamp gauge
-windows_os_install_time_timestamp 1.6725312e+09
+# HELP windows_os_install_time_timestamp_seconds Unix timestamp of OS installation time
+# TYPE windows_os_install_time_timestamp_seconds gauge
+windows_os_install_time_timestamp_seconds 1.6725312e+09
 ```
 
 ## Useful queries
diff --git a/internal/collector/os/os.go b/internal/collector/os/os.go
index 08cde8de..da630628 100644
--- a/internal/collector/os/os.go
+++ b/internal/collector/os/os.go
@@ -122,7 +122,7 @@ func (c *Collector) Build(_ *slog.Logger, _ *mi.Session) error {
 	)
 
 	c.installTime = prometheus.NewDesc(
-		prometheus.BuildFQName(types.Namespace, Name, "install_time_timestamp"),
+		prometheus.BuildFQName(types.Namespace, Name, "install_time_timestamp_seconds"),
 		"Unix timestamp of OS installation time",
 		nil,
 		nil,
diff --git a/tools/e2e-output.txt b/tools/e2e-output.txt
index bce795fa..19f62d6a 100644
--- a/tools/e2e-output.txt
+++ b/tools/e2e-output.txt
@@ -287,8 +287,8 @@ windows_exporter_collector_timeout{collector="udp"} 0
 # TYPE windows_os_hostname gauge
 # HELP windows_os_info Contains full product name & version in labels. Note that the "major_version" for Windows 11 is \\"10\\"; a build number greater than 22000 represents Windows 11.
 # TYPE windows_os_info gauge
-# HELP windows_os_install_time_timestamp Unix timestamp of OS installation time
-# TYPE windows_os_install_time_timestamp gauge
+# HELP windows_os_install_time_timestamp_seconds Unix timestamp of OS installation time
+# TYPE windows_os_install_time_timestamp_seconds gauge
 # HELP windows_pagefile_free_bytes Number of bytes that can be mapped into the operating system paging files without causing any other pages to be swapped out
 # TYPE windows_pagefile_free_bytes gauge
 # HELP windows_pagefile_limit_bytes Number of bytes that can be stored in the operating system paging files. 0 (zero) indicates that there are no paging files