A co-worker of mine is having problems with his son's Sony VIAO PCG 7F1l. One day, it suddenly asked a password for no reason (not sure if it's a bios password or other security issues). He tried sending it to Sony's service center but they refused to fix it for lack of credentials. It's an old laptop and his receipt and other credential documents about it has been misplaced and couldn't be found. How do we reset the password? Is the procedure the same as resetting a desktop PC password (removing batter, or switching jumper)? Any assistance would be greatly appreciated, Thanks.

SOURCE: Password Recovery

The login you are using should have placed you in super-user mode. Are you connected directly to the switch with a serial console cable?

SOURCE: Advent 7110 bios password hell

ftp://ftp.sabioproducts.com/pub/Notebook/EF6C/EF6C_Service_Manual
I believe this is the manual associated with this Advent laptop. Select "disassembly instructions". Item is a viewable PDF document.

SOURCE: How to reset bios password

The FSC 1320D's are truely remarkable... We haev had a default BIOS password for our laptops for a while now, but it has recently started to have been guessed or found out. So of course, they needed to be changed. And suprisingly enough, the FSC 1320D will not allow you to reset the BIOS password through ANY user method so far, and we really have tried everything.
Removing the BIOS battery - This does nothing, at the best of times the system will display an error saying it has been removed but other than that the BIOS password remains.
Updating the BIOS - Most people would suspect that if you update the BIOS it compeltely refreshes the set system settings, including the BIOS password. This again, is not the case with this model, as every attempt at updating the BIOS so far has been deemed useless.
BIOS Corruption - This again, does not work. It leaves the system in a dead state, usually the BIOS resets. This has occured once, as during boot we noticed the options to scan memory had changed and it took longer, but the BIOS password remained.
Backdoor Passwords - Again, do not work. We have tried the entire list submitted by Ekse.
Reset VIA Software - There are some hacking programs out there which reset the BIOS through the Operating System. And i think we can all guess what im about to say... They don't work. It may just be for this model, as i've not tried them on others, but the BIOS password for the FSC 1320D does not get reset using this applications.

So, the verdict?
Apparently you can submit your laptop back to Fujitsu Siemens for an 'Out of warranty repair', and they will reset it for you. Assumingly by changing the BIOS chip completely. The only downside to this is that it can cost anything from £50 - £150 depending on service charges and delivery costs. My opinion, wasting time on a laptop that is past its sell-by date like the FSC 1320D is really not something you want to be doing. Buy a new laptop and sell the 1320D for spare parts.

SOURCE: Intel 102ggc:The Firmware has detected that Cmos Checksum Error

if you have vista you could do a memory check in the boot options by resarting computer and key f10 boot options, then find memory check witch will display any errors with soloutions.

SOURCE: How do I reset the bios password for my Amilo Pro

If you remove the battery and leave it out for several minutes the password will be removed.