How to know that you have a RAM problem

RAMs problems can't be easily specified because many other hardware problems have the same effect on you PC, but if you have a damaged RAM, you will note that the computer give you a blue screen suddenly and this will occur many times specially if you try to open a big application or game that consumes a large space in RAM.
If you have a copy of Linux operating system on a bootable CD or DVD you may find a memory test program or try to get one from the internet and use it to check your PC's RAM. If you find any errors then try to check each RAM alone if you have more than one,but the faulty one can't be repaired in most cases,so it's recommended to buy RAMs that have a long warranty or a live time warranty like Kingston to make sure that you won't pay more money on such hardware that can be easily damaged by heat.

Does your computer restart suddenly?

This problem maybe cause by viruses or an error but if the windows tells you that the computer restarted to de protected from hardware damage or tha there are errors in RAMs you should know that your RAMs are often well and the problem is in a new hardware you have connected to your PC ,but you may say that you didn't connect any new hardware ,then you should make sure that your power supply is working well as it mainly causes this problem.You should also make sure that your DVD/CD ROM is working well as if the mechanical parts of them stopped ,the windows will shut down at once to prevent the damage.

What will you do if Quick Time asks for a CD to run a normal video file ?

In some cases when you try to open a multimedia file with Quick Time player,it asks you to put a CD into the CD drive to open that file although it is on the hard disk. The quick solution to this problem is to put any CD into the CD Drive, but the real reason for this problem is that you have added a file that was on a CD or DVD  to the favorites menu and for an unknown reason ,the program must check if this file is exist on the CD before opening the file you want open at that moment. So, you should remove the file from the favorites or delete all the favorites by this method: open the folder " Documents and settings " then "All users" then open " Application data " then "Quick Time".
Search for the file " quicktimefavorites.qtr " then delete it. Restart your computer and this problem will completely disappear.