Google redirect, killed Spybot, no updates possible, etc.

Found this site by chance. Thank GOD!!!

system:
Windows XP Professional Service Pack 3 (build 2600) Dell Computer Corporation Dimension 4600
System Service Tag: GG5DL31 (support for this PC)
Chassis Serial Number: GG5DL31
Enclosure Type: Mini-Tower
Processor a Main Circuit Board b
2.40 gigahertz Intel Pentium 4
8 kilobyte primary memory cache
512 kilobyte secondary memory cache Board: Dell Computer Corp. 02Y832
Serial Number: ..CN4811137900SR.
Bus Clock: 533 megahertz
BIOS: Dell Computer Corporation A03 07/21/2003
Drives Memory Modules c,d
39.95 Gigabytes Usable Hard Drive Capacity
21.28 Gigabytes Hard Drive Free Space

SAMSUNG DVD-ROM SD-616T [CD-ROM drive]

ST340014A [Hard drive] (40.00 GB) -- drive 0 1024 Megabytes Installed Memory

Slot 'CHANNEL A DIMM 0' has 512 MB
Slot 'CHANNEL B DIMM 0' has 512 MB
Slot 'CHANNEL A DIMM 1' is Empty

Has worked flawlessly till this past week....THEN

Prevented from updating: WindowsXP; AVG; Zone Alarm;
Killed Spybot altogether.
Unable to go to previous restore point.
Found a several files like "Windows\system32\ncpa.cpl.manifest" and several more with same "manifest ".

Googled filename, but was redirected to ads. Had to go to work to be able to google filename. Seems to be a lot of people with this problem, but no one had any fixes for it. CAN YOU PLEASE HELP ME?

I am not a programmer or anything like that, but I'm not a dummie either. Would appreciate it if you didn't assume that I know as much as all of you when it comes to this stuff. Will do my best!!!

 

Logs requested?

Thank you Pete for your response.

I'm a little confused as to the logs to post. Don't know which ones to post.

Andy