Hi all I'm new here and excuse my bad English please!
Ive been using avast 4.7 since 2006 (when i bought the PC) and always have worked fine: protecting me against threats and deleting it. Until this year. In March 2008 (before update to 4.
i was infected by an unknown virus that caused me the impossibility of access to any desktop folder or Windows XP pro icon. When click on it the desktop and the icons disappears and appears again but the folder/icon doesn't access. I performed a scan the CPU usage elevated to 97-100% !. Ive to say that I have less than 1GB of hard disk free in 2 HDs. My CPU is AMD Sempron 1.6 GHZ 512 MB RAM. I use Firefox 2.13 and Spybot( it is necessary with new avast 4.8?).
When ended the scan appears 118 lines that cant be scanned showing messages like: (i translate from spanish)
the file is a decompression bomb, The file RAR/ZIP is corrupted, the compressed file is protected by password, the file pointer? cant settle? in the device or file specified.
Why happens this? Besides appears that it scanned 132 GB when Ive a 80GB and 40GB HD! 80+40=120?
Plus Ive noticed that the VRDB date is from 24-9-2006! Ive CCleaner and the past week when I ran it detected 300MB in a folder of Avast. Perhaps is that the VRDB? Or what? In the help a`ppears that this database is updated every 3 weeks but idont noticed that. Ive to generate a VRDB now and do a scan? Of course I update the virus database before every scan but no virus was detected. It lasted 2.5 hours.
I try to do a thorough scan and after 8.5 hours no virus was found! I restart in safe mode and I choose the Administrator account and did a normal scan but again no virus was detected. Ive to do a thorough scan in this mode or choose my name account (when in safe mode two accounts appear: administrator or another with my name). Its annoying to me perform a thorough scan in safe mode cause it means that I cant connect to internet and because of the high CPU usage its almost impossible to do nothing.
If i open the virus chest appears in the system files files like : command.com, kernel32.dll,winsok.dll, winsock32.dll. What are doing this files here if I don't put them?
I update and scan with Spybot and appears that Ive no spyware.
I'm using windows firewall.
Yesterday I update to ver.4.8 and when I was moving the cursor when i have 27 tabs opened in Firefox and the whole system freezed! Is it cause by firefox, avast or a error hardware? Ive experienced this in an old 2001 PC. (the technician said that was motherboard). Is strange cause never happened before on the new one.
Anyone has happened this and anybody can help me? I'm very confused and tired, everything I do leads to nothing !