Random BSOD after many years of flawless laptop operation

My Toshiba L675 laptop has served me well for years with its native Win7, doing everything asked of it. I am in love with Win7! Unfortunately, over the past 5 months or so it has begun to randomly lock up with BSOD(actually a dark screen with no messaging). It won't respond to the keyboard or mouse so I am forced to do a hard reset to regain function. It might run for days or it might lock up after a few minutes.

I have tested the memory and the HD(a 1 TB HD that I installed a few years ago) and they passed with no errors. I regularly vacuum and blow out the cooling ports with compressed air and it doesn't seem to be overheating. Right now I am running the computer in safe mode as I start this thread. My intention is to see how long it will run without locking up. So far I'm a few hours into it with no problem.

I have been googling the problem with no success, so I am finally swallowing my pride and asking for help. This thing has me licked! I'm afraid that these hard resets are going to affect my HD one of these times and I have a lot of data I don't want to lose. Please help.

Thanks, Layback Bear!

axe0,
Thanks for the reply! I looked up that update and I believe that it is a misprint. Here are the available bios for my computer. The ones you recommended (highlighted in icky green-blue) have a version # of 1.10 and 1.20. Further down the list is another (highlighted in icky pink...) that has a 2011-10-05 date, but version # 1.70. The date must be misprinted on the green-blue version, as I doubt that Toshiba would start counting down with their version numbers. What do you think?

My laptop locked up again last night to the dark screen even though it was in safe mode. It lasted approximately 1-1/2 days this time.

ACPI Flash BIOS version 1.10 for Satellite L670D/L675D (PSK3JU)
Posted Date: 2015-12-30 | Version: 1.10 | Size: 3.87M
ACPI Flash BIOS version 1.20 for Satellite L670D/L675D (PSK3JU)
Posted Date: 2015-12-30 | Version: 1.20 | Size: 3.87M
ACPI Flash BIOS version 1.60 for Satellite L670D/L675D (PSK3JU)
Posted Date: 2011-10-05 | Version: 1.60 | Size: 3.86M
ACPI Flash BIOS version 1.70 for Satellite L670D/L675D (PSK3JU)
Posted Date: 2011-10-05 | Version: 1.70 | Size: 3.86M
ACPI Flash BIOS version 1.50 for Satellite L670D/L675D (PSK3JU)
Posted Date: 2011-05-24 | Version: 1.50 | Size: 3.86M
ACPI Flash BIOS version 1.40 for Satellite L670D/L675D (PSK3JU)
Posted Date: 2011-01-21 | Version: 1.40 | Size: 3.86M
ACPI Flash BIOS version 1.30 for Satellite L670D/L675D (PSK3JU)
Posted Date: 2010-10-18 | Version: 1.30 | Size: 3.86M
ACPI Flash BIOS version 1.00 for Satellite L670D/L675D (PSK3JU)
Posted Date: 2010-10-18 | Version: 1.00 | Size: 3.86M

axe0 said:

I noticed that too, which is why I stated the date instead of the version

I don't understand. I have version 1.70 on my computer now that has been working for years; why would I want to drop back to an earlier version?

axe0 said:

It is not the version you need to compare, but the date in this case.

With all due respect, that makes no sense to me. Why would I want an earlier version with a mistaken label. Obviously, whoever typed in the database made an error.

Still waiting patiently in Wisconsin for a reply....