Hi Kishan3,
Thank you for the reply.
Please use the system used to create the post on the forum. Download the required files on a flash drive and connect it to Dell Inspiron N5110. Ensure that you install the files with administrator access.
Right click on the file > select "Run as administrator".
Also, please perform system restore which does not require internet connection and may help you resolve the issue.
Thanks & Regards
Manshu S
#iworkfordell