Hello TechSpot staff. I am new here In need of serious help. The past few weeks I've been having strange symptoms of viruses, BSODs, sudden reboots, which made me re-install my computer 3-4 times. It didn't help, the same symptoms kept coming back. Now, I am on the stage where one BSOD appears while loading Windows, it doesn't even allow me to Safe Mode. Now, I want to ask your staff WHAT shall I do while re-installing to prevent from the viruses etc. to come back. While re-installing I have tried to clean with various anti-virus programs, such as Malwarebytes, F-Prot, Kaspersky, Ad-Aware, AVG, NOD32, ComboFix, CCleaner and HijackThis. I didn't use these anti-virus programs in the same install of Windows, but It found, cleaned(ignored a few) and it didn't change ****. If you are wondering if this may be caused by new hardware, your wrong. I didn't plug in any kind of hardware in the computer when It started. I have cleaned my RAM with an airblower and a vaccum, blowed the dust off the CPUs etc. In my 14 year old experience of computer technology, I have NEVER seen anything like this, so I am kindly asking for your support, I hope you will answer my post. In conclussion, I need a step-by-step guide to avoid viruses and BSODs, while reinstalling Windows from scrach. I have a Windows XP Professional Operating system, Intel Pentium 4 processor and a 128MB video card.(Yes, I know, time for a new computer, for which I got no money for) Regards, Freeman14.