Windows 10: Grey cross over my file icons pdf and ppt

I use a windows 10 laptop and today suddenly when I opened my laptop to use a pdf file I could not open it on observing I found a grey cross over the icons and now I am unable to open it I tried updating my windows laptop but it is already up to date.

:)

 

ppt to pdf/doc conversion possible?

I've several lectures in powerpoint .ppt format.
I don't want to switch on laptop everytime when i wanna read them..specially during exams..

so i want to print them...but as ppt presentations have slides..if i will print by that way, it'll print 30-40slides for original 5-10pages..

so by anyway, can any software/trick convert ppt file to proper and printable format[e.g. pdf,doc - but not one page+one slide]?

i'm not able to explain properly..i hope you guys understand wht i want to ask..

Thanks.

 

Pdf file

Hello Bhaumik,

For you to download and access the PDF files, please follow the steps below:

• Please download and install the UC browser and Xodo PDF Reader & Editor from Windows Store.
• Once installed, please download the PDF file from a web page using the
  UC browser by tapping the PDF file you wish to download > Click
  Regular Download.
• Once the PDF file is downloaded, please go to App list >
  Xodo application > Menu icon > Recent Documents > tap the
  PDF file you've downloaded from UC browser.

Please note that if you have an existing PDF Reader application installed on your phone, we suggest that you uninstall it first.


Let us know if this works for you.

 

Rebuild icon cache


it seems i got a virus that corrupted some file association and filetype icons
have done all the steps in this thread, and restarted after eachone, and still got blank icons for doc/docx/xls/xlsx/ppt/pptx / pdf

what cant i do