You probably have a boot sector virus and/or a corrupted bios. you should stop
trying to boot normally, as you could damage your
Try booting into safe mode. If you succeed, download malware bytes
and scan to try and clear the virus. If this will not work you need either bootable operating system CD or
DVD or bootable boot repair utility (Norton Bootable Recovery Tool).
you have vital data on the laptop, you can remove the hard drive and use a hard
drive dock or external hard drive caddy to back the important data up onto an
external hard drive, but for that you need another computer (or a long session
in an internet cafe).
For the future, if you want value for money, avast! fee
edition version 6 is a perfectly adequate antivirus as long as you have some
additional anti spyware installed (malware bytes/superantispyware/spyware
terminator/spywaredoctor are all good). If you're willing to pay, get Kaspersky Anti Virus,
use a different browser (google chrome, firefox, opera, safari, etc.), do
regular scans, disk clean ups, registry editing and hdd defragmentations, create
regular restore points to resolve minor system corruptions or crashes and use
your anti virus to create regular custom made Recovery Disks on an over writable
cd-rw or dvd-rw when your pc is running well, for major system corruptions or
crashes or failures.
Back up important data to 2 separate external hard drives
(one regularly connected, one connected only occasionally and kept separately as
an archive - an insurance policy). be sensible when browsing new, unfamiliar
websites. Be particularly vigilant on danger sites such as file sharing,
social networking. develop the habit of keeping your mouse cursor near the blue
return arrow, top left to quickly leave a web page showing initial signs of
infection. do not be seduced by unsolicited free security scans and downloads
If you see signs of infection starting and leaving the infecting
page doesn't stop it develop the habit of a quick sequence of closing all
windows and dialogue boxes with the red button x top right, then, if necessary,
killing your router with the power switch, then ctrl+alt+del>task
manager>end process, then set anti virus to do a boot scan, then restart the
An anti virus is like a motorcycle crash helmet. It is not a guarantee that
you will not suffer serious damage, your real safety relies on foresight,
preparedness, vigilance, care, precaution, common sense and calm, swift,
considered, practiced reactions in the face of danger that you employ while
riding the bike. The helmet is just an extra element of protection and
reassurance. An anti virus is the same while using a pc.
Finally, if your pc has
vital data on it for work or other important functions, then use the main pc for
important things and, if you can afford it invest £170 in a net book for fun,
frivolous, non-essential browsing and downloading.
Hope this helps.