Quickstart errors!!!

Hi I have installed quickstart on my localhost, and I am getting a lot of errors:

1. Notice: Constant GK_REGISTER already defined in ... templatesgk_finance_businesslayoutsblocksnav.php on line 26
2. Notice: Constant GK_REGISTER already defined in ...templatesgk_finance_businesslayoutsblocksnav.php on line 26
3. Notice: Constant GK_LOGIN already defined in ...templatesgk_finance_businesslayoutsblocksnav.php on line 28
4. Notice: Constant GK_COM_USERS already defined in ...templatesgk_finance_businesslayoutsblocksnav.php on line 30
5. Notice: Undefined variable: width1 in ... templatesgk_finance_businesslibmenuGKMenu.php on line 144
6. Notice: Undefined index: k2store_order in ... modulesmod_news_pro_gk4gk_classesportal_modesgk.portal_mode_1.php on line 246
7. Notice: Undefined index: SID in ... modulesmod_news_pro_gk4gk_classesportal_modesgk.portal_mode_3.php on line 175
...
what seems to be a problem? Thanks in advance...