- Extract the downloaded rar file.
- Open Kaspersky> Settings> Appearance
- Tick "USE ALTERNATIVE SKIN"
- Browse windows7 theme to extracted folder and click apply.
- Restart Kaspersky.
- Now, you'll have Windows 7 in Skin Kaspersky
(NOTE: If you delete the folder in which Windows 7 Theme for Kaspersky was extracted, then you may get some problems with Kaspersky.)
Uninstallation Instructions:
If you want to revert back to the Kaspersky skin it's original one, then follow the following steps:

- Open Kaspersky> Settings> Appearance
- Untick "USE ALTERNATIVE SKIN"
- Restart Kaspersky.
- Now, you'll have your default Kaspersky Skin activated.