|Plug-ins help web browsers perform extra tasks.|
If you are using IE, then look in this folder
C:\Program Files\Internet Explorer\PLUGINS
For a file like this
That is the plugin file for Flash. If not, then IE will not do Flash. Have to install again.
My Flash plugin is in my Netscape browser.
Also, Most Virus and Spyware scans are likely to work better in Windows Safe-Mode.