Question Solved by OP. Windows won't boot

[Cryptopunks]

Hi everyone, two month ago I noticed that my PC was booting very slow especially it took a long time to pass verify dmi pool data. I changed the cmos battery and it solved the issue ... For a week! At this point windows was booting but system was very slow at verifying dmi pool data. A month after I replaced cmos battery, PC couldn't boot windows (just a blank black screen). I restarted it a few times and now it was trying to boot from cd/DVD. I reinstalled the windows. I thought maybe my hard disk is failing, so I checked crystal disk info, hard disk sentinel and hard disk was at 100 health. One week after, I'm experiencing the same issue again. I have tried to repair windows but didn't help. I'm assuming it will happen again so I haven't reinstalled windows yet. Any ideas. System is a 10 year old ,but hard disk is 4 or 5 years old.

 

[Darkbreeze]

If this is a ten year old system, and it is intermittently and randomly having the problems you've described, and the drive health is good, then it is most likely a motherboard or power supply issue.

What are your FULL hardware specs including exact PSU model?

 

[Cryptopunks]

If this is a ten year old system, and it is intermittently and randomly having the problems you've described, and the drive health is good, then it is most likely a motherboard or power supply issue.

What are your FULL hardware specs including exact PSU model?

If this is a ten year old system, and it is intermittently and randomly having the problems you've described, and the drive health is good, then it is most likely a motherboard or power supply issue.

What are your FULL hardware specs including exact PSU model?

Hi. A few days ago I reconnected power and SATA cable of my HDD. But I didn't connect it to the same one before, and all of a sudden it booted!!! I scanned hard disk with hd tune pro and no error! What do you think was the problem? The strange thing is I tried to repair windows and it showed no windows installed and I tried to fix bootrec and hard drive was completely empty and unallocated!!! But it booted today after SATA and power cable swap and all my files are intact. Tha

 

[Ralston18]

Agree: as stated by @Darkbreeze I would also suspect a motherboard or PSU issue.

Something loose/intermittent and hard to troubleshoot.

All may seem well now but do be sure to keep all important data backed up. At least 2 x copies away from the old and likely problematic PC.

Verify that the backups are recoverable and readable.

 

[Cryptopunks]

Agree: as stated by @Darkbreeze I would also suspect a motherboard or PSU issue.

Something loose/intermittent and hard to troubleshoot.

All may seem well now but do be sure to keep all important data backed up. At least 2 x copies away from the old and likely problematic PC.

Verify that the backups are recoverable and readable.

I agree, of all the parts that can go wrong, motherboard is the trickiest one to identity as source of the problem. I also checked all the transistors on MB to see if any of them is leaking and no problem in that regard