Windows 7 just when all was well : now this bit of a problem

[3doz]

without warning this started to happen .
explorer stops working : as does internt explorer
powerdirector stops working
powerdvd stops and starts
as deos some others

so somthing is common but what

 

[Snake]

This could be a hardware issue with your computer. (bad ram) Have you had any Blue Screens? Have you tried formatting Windows and starting fresh?

 

[3doz]

This could be a hardware issue with your computer. (bad ram) Have you had any Blue Screens? Have you tried formatting Windows and starting fresh?

no its now only three programs and internet explorer
tyhis happens a lot I have reset the options and cleard the files