>4. If you have Window’s User Account Control feature enabled, it’ll throw up a prompt asking if the file is okay to execute. If you aren’t 100% sure that the f

>4. If you have Window’s User Account Control feature enabled, it’ll throw up a prompt asking if the file is okay to execute. If you aren’t 100% sure that the file is legit, avoid doing so. If opening PowerPoint file throws up UAC promt, that is so good evidence for that file to not be legit that your prior estimation for it to be legit realistically can not be close enough to 100% to override this evidence. So, if opening PowerPoint file or other office document throws up UAC promt: 1. Say No. 2. Warn person who send you that file and other people who could receive it. If you created this file or if you opened it before and it did not throw UAC promt, that means that your system is probably infected and may be all your other documents are infected, warn other people about it. 3. Send this file to VirusTotal. 4. Run antimalware check on your machine with free tool from legitimate antivirus vendor (such as Dr.Web CureIt, Kaspersky Virus Removal Tool, Microsoft Windows Malicious Software Removal Tool). If VirusTotal said you that some vendors already detect that file as malicious, use tool from one of such vendors you trust more. Otherwise, prefer vendor which is not vendor of your currently installed antivirus, then wait until VirusTotal will detect malware in your file, and repeat this step.