Hi ashisharma052,
Welcome to the HP Forums!
I would like to take a moment and thank you for using the forum, it is a great place to find answers. For you to have the best experience in the HP forum, I would like to direct your attention to the HP Forums Guide First Time Here? Learn How to Post and More.
I understand that your Pavilion 15-n205tx Notebook is slow to respond. Here is a document to assist you with improving the performance. Improving System Performance without Adding Memory (Windows 8).
If this has not helped you can try Refresh Your PC to Resolve Problems (Windows 8) or a HP recovery back to factory.
Performing an HP System Recovery (Windows 8).
During the recovery process you will have an opportunity to backup your personal files to prevent data loss. If you have not done one recently, I suggest you do one now.
Restoring Files that were Backed Up Using HP Recovery Manager (Windows 8)
You could also contact HP support for assistance.
Please call HP technical support at 800-474-6836. If you live outside the US/Canada Region, please click the link below to get the support number for your region HP Technical Support Sitemap.
Please let me know if you require further assistance.