, using it to open PDF files from untrusted sources poses a significant security risk. Vulnerabilities found after its retirement will not be patched. Recommended Action
If you find adberdr11010-en-us.exe on your hard drive but do not actively use Adobe Reader XI: adberdr11010-en-us.exe
For most users, the answer is . Using a decade-old PDF viewer creates a significant security gap on your machine. Adobe Acrobat Reader DC - Download and install on Windows , using it to open PDF files from