I have a Dell 560 Inspiron, 6GB memory, Windows 7 Home Premium 64-bit with an HP Photsmart Premium Fax C410a printer. Lately I have been unable to print some Excel and Word files that have been sent to me by Dropbox. When I try to print the file goes to "unresponsive" and I have to use the Taskmaster to get out of the file. After this I can no longer print from anywhere, for instance my email. If I restart my computer I can print from places like my email again, but get the same problem if I try to print from the dropbox. Previously I could print from the dropbox. I ran Nick Francesco's Security Tango, and a bunch of other cleaners, but still have the problem. I only have starter versions of Excel and Word, but once again I could print from them previously. And I also have the same problem if I try using Office Libre. Any ideas?