For the last few days when i'm on the Pc it hangs for a few seconds. Very annoying. It just done it as i was writing this. I read somewhere that clearing out the cache would help. But i dont know how to do it. Any help appreciated. Cheers in advance.

PS. I've done adware scans and virus scan. So i know its none of those.

Tools - Preferences - Advanced - Disk Cache - Empty now

One of the options in Opera is to empty the cache on exit.

Go into Preferences

Click on History and cache

Check on "Empty at Exit"

Click on "Apply"

This is useful if you don't do any Off-Line viewing. It may also be worthwhile to increase the size of the Disk cache (Same page in preferences)

Hope of some help.