Computer seems fine now. All symptoms are gone but I can surf the web and do searches. I see that that ESET identified a few potential problems, though. These have not yet been removed...
ESETSmartInstaller@High as CAB hook log:
OnlineScanner.ocx - registred OK
# version=7
# IEXPLORE.EXE=8.00.6001.18702 (longhorn_ie8_rtm(wmbla).090308-0339)
# OnlineScanner.ocx=1.0.0.6528
# api_version=3.0.2
# EOSSerial=d3864d71810bdc4281281f9ff218de26
# end=finished
# remove_checked=false
# archives_checked=true
# unwanted_checked=true
# unsafe_checked=true
# antistealth_checked=true
# utc_time=2011-07-09 07:44:43
# local_time=2011-07-09 02:44:43 (-0600, Central Daylight Time)
# country="United States"
# lang=1033
# osver=5.1.2600 NT Service Pack 3
# compatibility_mode=512 16777215 100 0 70572343 70572343 0 0
# compatibility_mode=6143 16777215 0 0 0 0 0 0
# compatibility_mode=8192 67108863 100 0 0 0 0 0
# compatibility_mode=9217 16776869 100 77 27076286 30309558 0 0
# scanned=199153
# found=3
# cleaned=0
# scan_time=13451
C:\Program Files\BackWeb\BackWeb Client\6.2.3.66\Program\runner.exe probably a variant of Win32/Agent.CBFNBEO trojan (unable to clean) 00000000000000000000000000000000 I
C:\Program Files\Common Files\rurq\rurqd\vocabulary Win32/TrojanDownloader.TSUpdate.J trojan (unable to clean) 00000000000000000000000000000000 I
C:\Program Files\Updates from HP\137903\Program\BackWeb-137903.exe probably a variant of Win32/Agent.CBFNBEO trojan (unable to clean) 00000000000000000000000000000000 I