回复：How to Clear Browser Cache

Actually, gmail itself has not much to do with cache. Likely, the email you got is a hoax, trick you to click those links. But no one know more of your PC than you do, to play safe you can clear the browser cache yourself instead of clicking those links, provided that the email message is true.

regularly clear browser cache is a good practice to keep your PC clean and up to its speed. As for how to clear cache,

If you use IE

http://www.microsoft.com/windows/ie/using/howto/customizing/clearcache.mspx

if you use firefox, go to tools>options>privacy you can set history, forms, passwords, cookies, and cache to whatever you want...