BSOD frequent- Error codes x3B,7E,1E,0a,24 changing alternately

I have Windows 7 Compaq with AMD II, Recently interchanged Zotac Video card(ZT-20303) working well from other computer and also loaded ADOBE Photo shop(2 weeks back).

Notron security system installed since 1 year

BSOD started 2 days after video card installation
= to solve BSOD- action taken so far
- Updated NVidia drivers to latest
- Removed printer driver as reported by Norton tools(problem reported)
- Ran Compaq PC doctor- no issues on any counts
- Ran Notron tools- no issues
- stays on for 12 hours without issues, but then stops with BSOD and reboots
- Previously same PC used to be on for weeks/months without any issue
- I have also checked that Full Scan (Norton) running in background, but never gets completed and may be the reason

I'm not able to understand well your statement regarding the video card. Are you mentioning that the card was ok on a previous computer but when installed in this computer the PC has been bugging out? Have you switched it back to the previous computer to see if things remain stable on that computer as well, and if the victim PC stabilizes without the video card?

Just so you are aware, Compaq - as well as many OEM PCs - are designed with very cheap components and usually only enough to keep a system stable for a minimum amount of time with the default configuration. This is especially true with their PSUs (power supplies), which usually are designed only to handle default configuration and - like any PSU - will degrade in wattage output with age. There is a very, very good possibility your new video card is overtaxing this system's power supply beyond its capacity.

Other than that, I cannot explain about this any further beyond what's currently available from the data. I can say that the erratic pattern, as well as other signs such as missing bits in CPU registers, all point to hardware failure of some level. One cannot really deduce what exact hardware is responsible from crashdumps, but there are hardware tests that can help. I recommend you do the card swap first to see what happens when this PC runs without the new card before going for tests. If the card itself goes great on one PC but it causes another PC to go unstable, than I have to point blame at an insufficient (or bad) power supply.

the PC-1 with problem now, had a perfectly working Video card which I placed in other PC-2. I have taken a perfectly working Video card(Zotac) from other PC-2 (Compaq)(which was also working well since last 2 years(generally on for months).

Both video cards are functional before interchange wthout any BSOD - except the video card under issue (Zotac) has a non working HDMI output and this is the reason for change over.

I will re-change over to the original PCs and see if indeed this is an issue.

But sincerely I did not want this, as I wanted to use HDMI output card for the other PC-2) and if any other solution can be found

The point right now for switching them back is to make sure if it is that specific card that's causing problems for a specific PC, or if the card is now causing problems for any PC.

Btw, you said the card has a nonfunctioning HDMI port? That's conducive of a bad card, and should really be replaced whenever possible. You cannot be sure that it's just the failed port on the card, as it could be that port along with other internal failures.