What is the solution for the computer if install new software/application ,computer does not start/restart/work/boot/hangs ?

If the system started acting weird after a software installation, the safest and quickest option is to hit your F8 key and from the advanced startup option choose "last known good configuration".

If the above posted does not solve your issue, you can try booting into safe mode and from there use the System Restore Utility.

Or you can use the Mini Windows7 / Mini XP and manually remove the cause of the issue. (somewhat more advanced option )

If by any chance you have the dual boot option you can pinpoint the software causing the error,

or you can just boot from the UBUNTU LIVE CD and see whats going.

Actually there are couple more options to explore, but I believe it isn't necessary because one of the above method will yield a solution.

Regards, Muhamed.

It depends if you trust the application I mean you get it from popular, secure and trusted site or get it somewhere that opens path for viruses.

Sometimes you may miss something that requier start application software to work: The operation type of windows, No more enough space or low capacity, Hard drive speed or Data Processing is low, some applications need other applications to work for example the combination between java or Adope flash and Internet Explorer.

You can name many things that the application is fake, spy content, the program itself is virus hiden by it looks, the program is too old to use and there is no new version of it that works with new operation windows.

There is no specified answer for this ,your expirence and knowledge depends for solution.

In this case you will enter to last known good confiruration , if this didn't solve problem , try to enter to safe mode and uninstall this software or Driver that make problem and try to search about compittable version or another driver if it was driver defination .

Wawwwwwwwwww, All this problems, So You Need to bay an other computer Brother!!!! and send this computer to the trash

Basm Allah Alrahman Alrahim

there are3 solutions

1-  restore ( read this article why restore stronger than Last Known Good Configuration )

2-  last Known Good Configuration

3 - migaration

but !

You must first make an image from your OS partation ( you can use any program for backup image from hiern boot15.2 (example acronis segeat ) or any other available helping DVD

Then you can try the3 solution

I agree with MR Muhamed Lihic

Enter safe mode by pressing F8 at boot menu and uninstall application which makes problem.

Also try to repair windows using your windows DVD disk/USB pen drive. 

If computer doesn't boot after installing new application or drivers then first step toward troubleshooting is to boot it to last known good configuration. If the problem is due to installation of wrong driver then it may fix the problem.

Always check you application/software compatibilaty with the operating system.