Question about Outlook Express

I cannot open Windows Live Mail , as this error code comes up .  Windows Live cannot open because of this error code ( 0X00C155.2 )

I cannot remove Microsoft Download Manager as it keeps asking for Administrator password and will not accept it when given ,

the same happened when I tried to remove Microsoft Security Essentials .

 I am finding the same happens when I try to remove another programme .

Why is this happening ?

I have had to set up another Administrator account on my computer as it stopped recognising the original one .

I have just had to have a new  C hard drive fitted on my computer , as the manufacturer had fitted a C Drive , that had a serious flaw in it ,

so after starting from basically nothing apart from Windows 7 Home Premium being installed had nearly finished adding everything back ,

for this to happen .

I have searched for this code but cannot find it anywhere .