step 1:run git bash as administrator
step 2 :run command
git config --system --unset credential.helper
git config --global credential.helper store
step 3:
git clone ''http://xxx.com'
then enter username and password
step 1:run git bash as administrator
step 2 :run command
git config --system --unset credential.helper
git config --global credential.helper store
step 3:
git clone ''http://xxx.com'
then enter username and password