is to review your anti-malware precautions.
Do you use a firewall? If so, which one. Any is better than none, and if you have none, turn on the XP Firewall immediately.
Is your Operating System up to date? You haven't given any details of your system, eg XP, but with SP2, or just SP1, or no service packs? Have you updated Windows recently? When?
You mention adware/spyware, but no anti-virus. What anti-virus do you use? Are its virus definitions up to date?
Try an online anti-virus scan at Housecall, http://housecall.trendmicro.com Delete everything it finds.
What anti-spyware do you use? (Spyware includes adware). Are the anti-spyware definitions up to date?
If you only have one anti-spyware utility, consider beefing up your protection with;
Ewido, Spybot Search & Destroy, WIndows Defender and Spywareblaster.
Install, update all, then scan with all and with your anti-vius, one at a time, in Safe Mode. Turn off System Restore before entering Safe Mode to delete all the System Restore backup files, (they can harbor viruses/spyware), and turn it back on after you return to Normal mode.
Which browser do you use? Internet Explorer is prone to attack. You may want to consider moving to another browser, like Opera, of Firefox.
Do you use applications like P2P filesharing? If so, that is most likely where you pick up any viruses, from infected files.
Do you open email attachments before checking them for viruses. Another source of viruses. Outlook and Outlook Express are also prone to attack. Consider moving to Thunderbird or another email client.
All of these are the things that we normally see as the cause for slow performing computers, and slow internet connections.
I have a cable connection and lately I have notice that most of my internet pages are laoding painfully slow. I have clean up the temp files, cache and have check for adware/spyware. I am directly connect to the cable modem so there is no interference with a router. My cable provider says there is no "packet loss" when they ping by IP. They suggest that it is something to do with my PC any suggestions?