Phew!! It doesn't happen only one time when your system gets corrupted. Whenever your internal files encounters virus your system stops working which causes harmful reactions on your files , stored on your hard disk. What can be done in these situations.
Once i came across the same situation while i was creating slides using powerpoint. I imported some templates from Internet to make my presentation more attractive and user friendly but i didn't know that there was some virus attached with the downloaded files. As soon as i opened my powerpoint i got an error message that "File can not be opened".
What could possibly happen? It is nothing just virus attack.
To elaborate this, presence of a virus in the system can adversely affect the PowerPoint file, causing its corruption. To get your data back one must have backup file but what if you have not maintained a backup file then you need to go for efficient powerpoint repair tool to retrieve all content of powerpoint file.
Cause:
Probability of virus infection cause powerpoint file corruption. As it was downloaded via Internet so there are high probability that the file was virus infected which might have corrupted your powerpoint file.
Resolution:
Give your concern to the following measures to resolve the issue:
Either , Try to open the file on another system. If it opens, then the problem is resolved.
Or, Try to repair the file using Scan Disk utility and open it to access the data.
If still it does not work then you can recover slides by importing them in another presentation.
However if the issue doesn't get resolve then you need to opt for powerpoint repair tool to repair all corrupt file and retrieve the contents. These tools uses such scanning algorithm to scan that repairs the all damaged files effectively and don not make any changes to the original contents.