Just had a call from what sounded like a female Dalek.
HEL-LO. YOUR COM-PU-TER IS GEN-ER-AT-ING SOME SER-I-OUS ERR-ORS AND WAR-NINGS. PLEASE PRESS 1 TO *click*
I presume it was one of these anti-virus scams wherein the dupe is persuaded to hand over a credit card number and comprehensive personal details in exchange for having malware installed on his computer. Didn't stay on the line to find out.