My browsers (IE6 & Firefox) are hijacked daily by a Lenovo website at http://www.lenovo.com/us/en/ I've used Spybot, Adaware and also reinstalled the browsers. This problem keeps reoccurring. Does anyone have an idea of how to stop this?

are you using the immunize feature in Spybot? If not, you may want to.
Also use Spyware Blaster and you may want to try this free online scan: http://www.spywareinfo.com/xscan.php
and remove all it finds.

Hopefully my advice will help you...Please post back with your results....thanks

Thanks for the suggestion. I have been using SpyBot Immunize and the online scan link that you provided did find some adware called ProvenTactics 3.5, so I removed that. Unfortunately after rebooting the browsers are still reverting to the Lenovo website. I will give Spyware Blaster a try.

download cure-it:
http://download.drweb.com/?lng=en and run that
Then you may want to do a few on-line scans with housecall and Bit Defender, they will give you the option to clean out the spyware or viruses.
Good Luck

Hopefully my advice will help you...Please post back with your results....thanks

http://www.superantispyware.com/?ta...

Give this one a try too; it's very thorough. Also give it a scan in Windows safe mode too...