Exe files causing problems

[Jock]

Seem to be having some weird problems on my new computer.

Basically I download any exe file, go to run it and the computer ticks over for almost 10minutes before it then decides to open it. The weird thing is that if i reboot the computer it works immediately and thereafter, its only between downloading it and re-booting the computer.

In terms of protection on the computer i only have windows firewall and Microsoft security essentials but disabling them doesn't seem to make any difference.

Anyone got any ideas what could be causing it?

Its a brand new computer with really good spec so it cant be down to hardware i dont think.

 

[Jock]

Had a quick look and there seems to be nothing but errors all over the place though none of it seemed to make a great deal of sense or jump out that it was to do with the problem.

 

[Jock]

Might have narrowed it down a bit.

If i right click the file and run as administrator it runs srtaight away, but if i double click it, it follows what was mentioned above.