Thanks for your advice Chris, but this still doesn't solve my problem. My computer insists that Adobe Flash is 'Not Trusted' and refuses to downlload it.

Hi Pat. Here is a picture of the message I recieve when trying to download flash normally:

And here is a picture of the message I recieve when I used the direct link Chris Campbell suggested in his post (I've only blocked out my name):

As you requested, I'm running a 64-Bit operating system with Windows 7 Home Premium. I encountered this problem once before, the last time I had to update flash, but managed to work around it somehow. This time though, I just can't find a way to install it.

I am the administrator, and so I've tried to follow your advice. However, I couldn't find anything directly called 'Local Security Policy' or any of the other things you mentioned. I did however, find myself tring to import the adobe flash player policy in the windows firewall with advanced security. But much to my dismay, this message appeared:

Alas, I have been a few days without flash. I hope someone can help soon!

Sorry Pat, but I still can't find it. When I type in 'Local Security Policy' into the seach field you specified, I recieve a load of Word documents about iPad, iPhone and iPod licences. As I posted before, the only thing about policies that I could find was in the windows firewall and advanced security to which I recieved the message I posted before when trying to import adobe flash. Do you know why the certificate is revoked, or why my laptop classifies it as 'Not Trusted'? I know I haven't done it on purpose by myself, so I wonder why it has gone that way...