Windows 7 takes long to start and fails so need to do system restore each time


I have two machines with this problem: the laptop has this issue for about a month and the pc has just started developing the issue. in short, when Windows 7 x64 Pro starts up it takes ages to start up and it wont start. SO you pull the plug and then it automatically attempts repair and offers system restore. The system restore completes successfully and Windows starts up ok. If you restart the computer straight away it will restart fine but if you leave it off for couple of hours you are back to square one i.e. Windows takes ages to start and you do system restore. And so on and on.

Originally, I thought it may be Windows update but we had quite few of them on both and I cannot pin point which one it is although I was thinking it may be KB2952664. There were changes except updates on the laptop prior to the problem starting up and on the pc it was updates and Microsoft EMET installed. Both systems use AVG which update automatically. I ran check disk and sfc but it didn't help.

Unfortunately, I am unable to do the restore to the point before all these updates nor I do have backup.

I would appreciate any help and ideas.

Tom SkowyrskiAsked:
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Scott CSenior EngineerCommented:
Make a backup of all of your data first.

I would suggest trying to do an "in place upgrade" to do a repair on your systems.

Failing this, I'd do a wipe and reinstall of the entire system and re-install your applications.

It's strange that the same thing is happening on two machine, but that shows that the same thing happened to them.  I wouldn't think it is an update because the rest of the world would be screaming.
JohnBusiness Consultant (Owner)Commented:
Unless the machines were damaged beforehand, Windows Updates do not cause this issue.

EMET works fine - I use it myself. Perhaps exclude AVG from EMET application checks to see if that is an issue. Look at my Windows 8 article for the way I set up EMET (applies to Windows 7 as well).

Can you set up a test Windows User profile and log in as the new User. Does this work? or do you have the same issue?

Of course, you should can completely for viruses and malware with your own application and then again with Malwarebytes.

You may need to do a Windows 7 Repair Install. For this, you need your Windows 7 DVD, boot from it and select Repair. Here is a Seven Forums tutorial to assist you.
Test your disk using it's manufacturer's diagnostic utility, and if it finds problems, replace the disk. Also test your RAM using memtest86+.

You'll find both of those tools on the UBCD, unless your disk is an SSD, then you will have to get the utility directly from the SSD manufacturer and run it:
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Tom SkowyrskiAuthor Commented:
I don't think that the problem is with the profile because it doesn't even get to that stage.
I scanned with Malwarebytes and AVG. Nothing found.

Both machines are using Samsung 840 Pro SSD 256GB.
JohnBusiness Consultant (Owner)Commented:
It could be a hardware problem as rindi suggests, but that means two machines with the same hardware issue. It is possible the SSD drives on both machines failed.

Start in safe mode and see if you can run SFC /SCANNOW from an admin command prompt.

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Tom SkowyrskiAuthor Commented:
Checked Samsung Magician software. It doesn't report any problems and the drive is on the latest firmware.

I will run sfc in safe mode today.
Tom SkowyrskiAuthor Commented:
I ran sfc in safe mode and it found no errors. I also used msconfig to enable boot logging so will see.

I am going to contact Samsung support as well.
any errors in event viewer - or in device manager?
Tom SkowyrskiAuthor Commented:
Updating the firmware on the drives sorted out the issue. However, I first removed AVG antivirus, then updated Samsung Magician software, restarted machines and then updated Samsung SSD firmware through Samsung Magician and finally installed AVG after system restarted.
Just for the information it was Samsung 840 EVO 256GB causing issues.
After all of that all windows updates were installed, even the hidden ones and system starts up ok.

Thank you for all your guidance
JohnBusiness Consultant (Owner)Commented:
@it10 - Thanks and I was happy to help.
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