I imagine many people here still use adobe pdf reader to read PDF files.

apart from being a massive piece of bloatware , it also is a massive security risk to your windows computer

it is highly rescommended that you uninstall the adobe problem child and then install Foxit PDF reader which will serve you well for all your PDF reading needs.

also foxit has fixed the latest exploit vector with reading PDFs and adobe has not.

Foxit Software - Downloads(Latest Version)

Several security companies today warned of a major malware campaign that tries to dupe users into opening rigged PDFs that exploit an unpatched design flaw in the PDF format. Users who open the attack PDFs are infected with a variant of a Windows worm known as "Auraax" or "Emold," researchers said.
The malicious messages masquerade as mail from company system administrators and come with the subject heading of "setting for your mailbox are changed," said Mary Grace Gabriel,A PDF attachment purportedly contains instructions on how to reset e-mail settings. "SMTP and POP3 servers for ... mailbox are changed. Please carefully read the attached instructions before updating settings," the message states. In reality, the PDFs contain embedded malware and use the format's /Launch function to execute that malware on Windows PCs running the newest versions of Adobe Systems Inc.'s Acrobat application or its free Adobe Reader,