You didn't post the Make, Model of laptop or the OS you are using so I have no idea what solution to suggest. I have to assume your machine has decent hardware specs and the OS is Windows 7. Their may be to many processes running overloading the Processor/Memory. Start by cleaning and disabling unnecessary startup programs. A generic solution/suggestion is : http://www.techrepublic.com/blog/10things/10-ways-to-speed-up-windows-7/3332
Use these two Freeware programs to Clean up your machine, 1, CCLEANER at: http://www.filehippo.com/download_ccleaner/
Run the cleaner to remove the junk from your machine, in the TOOLS section, STARTUP section, disable ALL unnecessary startup programs, reboot. 2, MALWAREBYTES at: http://www.filehippo.com/download_malwarebytes_anti_malware/
In the install UNCHECK the TRIAL PRO version, you want the freeware version. Run a FULL scan, delete ALL results and reboot. ALSO, Open Control Panel, select Internet Options, select Programs tab, open Manage Add Ons, in Toolbars and Extentions, disable ALL toolbars and unnecessary Extentions, open Search Providers , select Google as default and remove all others. Run a Full Scan with your up-to-date Anti Virus Software. Run Windows Updates for ALL current updates.