Do you use anything besides Ad-Aware, like Spybot, etc? How about viruses. Ad-Aware is great but it doesn't check for those. Did all this happen at the same time that you installed SP2 or anything else? I would check for viruses first.
On startup the msg "Press F10 for recovery" appears and, until F10 is pressed, msg repeats. Pressing F10 continues boot up sequence.
The internet has slowed to a crawl - have installed SP2 and fitted Lynksys wireless system, but these should not affect. Have NAV, router is firewalled and use Ad-aware regularly.
PC is 2600 with 512 MB RAM.
Thanks in anticipation