Here are two possible fixes I’ve come across on the internet:
- Just refresh the icon cache by deleting the IconCache.db file from your profile directory (usually /Documents and Settings/Username/Local Settings/Application Data). It will be automatically recreated.
- go into Display Properties under the Appearance tab. From the Item drop-down list, choose Icon.
- Click the up arrow in the Size box to increase it one size. Click Apply.
- Click the down arrow in the Size box to return the icons to their previous size. Apply.