I opened a PDF file by Adobe Reader. I put Windows on sleep mode. After I woke Windows up, Adobe Reader shows only some recent pages (all of other pages are blank) and reports out of memory error on other pages. Is there a way to fix this problem?
EDIT
The problem occurs when the PDF files are in external hard drive. There is no problem with files in internal storage device. I tried Windows 8 Reader app, Foxit Reader and SumatraPDF, but the problem still exists.