Kiya, just delete the message it is a scam, do not phone the number and do not do anything else. Do you remember a bit of software I told you about called 'Malawarebytes' ? if you still have it on your PC let it run a full scan. I do not think you have any viruses or trojans, but to be safe do the following:
Delete all of your History & Cookies, then shut down.
Re-boot, do not log onto the internet and delete History & Cookies again.
Now run any Virus checking software you may have on your PC such as 'Microsoft Seurity Essentials' and let it do a full scan.
If it finds anything let it either delete it or quarantine it (if you get the option), but if anything is persistant, make a precise note of what the infection is called and post it on here.
On a more reasuring note the fact that you can still use your PC probably means all is OK, but this link will try to extort money from you if it suceeds in locking your PC.
DELETE,DELETE, DELETE
