Go to Task Manager and End Unnecessary program. then try to open and check.
you have mentioned that you have 4 gb ram 64 bit but check usable ram.
New ERA Pre-requites for Server Machine:
1. Windows 7, 8 and 10 with 32-bit OS (Recommended 64-bit
OS)/Server 2000 with 32-64 bit OS
2. Minimum 4GB RAM & 200 HHD
3. Minimum 512KBps Internet Speed
4. Google Chrome/Mozilla Firefox must installed
5. Anti-Virus
NEW ERA Pre-requites for Client Machine
1. Windows 7,8 and 10 with 32-bit OS (Recommended 64-bit
2. Minimum 2GB (Prefer 4GB RAM) & 200 HHD
3. Minimum 256KBps Internet Speed
4. Anti-Virus
5. Headphone with MIC
6. Webcam
7. Minimum Dot.Net 3.5