why my acer notebook startup screen turns black after selecting start windows normally?

[rmaham]

When i start my notebook it says meto select 3options like start windows normally.....After this the screen load the password screen but there it is written please wait while this my screen turns black and again turn to password screen....This happens repeatedly!!!!!!!!!Pls help!

 

[Nikolay Savov]

Hi
Use Hirens Boot Cd to :
- test RAM & CPU - MEmtest 86
- test HDD - MHDD 4.6
Any errors will show the problem !