After following this tutorial, you will be able to uninstall and remove softwares when you started your Windows PC in Safe Mode.
If you have installed software on your computer and for any reason it gives you issues, the best thing to do is to uninstall it. But what happen if such a piece of software keeps restarting your Windows operating system or worst, disables certain services so that you won’t be able to performs some important operation anymore ? In this case Windows will help you with a special feature called Safe Mode. Basically, in Safe Mode you will be able to troubleshoot your computer in order to fix issues. However, if you need to uninstall and remove some software, you have to know that this kind of “limited state” Mode has the Windows Installer Service completely disabled. Let’s see how to turn it on and uninstall everything; even in the Safe Mode configuration.
Windows Installation Service is responsible for the installation and uninstallation procedure. If you try to access it in Safe Mode you will get the following message: “The Windows Installer Service could not be accessed. This can occur if the Windows Installer is not correctly installed. Contact your Support Personnel for assistance”. The following tutorial will teach you how to turn the Windows Installation Service in Safe Mode:
Step 1
Click the Start button. In the Search field, type regedit and press Enter.
Right click over the regedit.exe that comes into search list; select “Run as Administrator“. Accept the security Prompt. Registry Editor will open.
Right-click on the Mininal key and from the menu select New – Key:
Now name the new key MSIService and change the value to Service by double-clicking it:
If you are in the Safe Mode with Network Mode, repeat the above steps for the following registry key: HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot\Network\
Step 3
The newly created MSIService will make available the Windows Installation Service in Safe Mode. However, I want to remind you that it is necessary to turn the new service on.
To do it, exit regedit, click Start and in the Search field type: services.msc and right click over the “services.msc” that comes into search list; select “Run as Administrator”. Accept the security Prompt.
From the list, locate Windows Installer. Right-click it and select Start:
Note: If the procedure to turn on Windows Installer does not work try this one:
1. Click Start.
2. In the search field, type cmd. Do not press Enter.
3. Right click the Command DOS icon and click the Run it as Administrator link.
4. In the command prompt, type net start msiserver.
System Manufacturer/Model Number COMPAQ Presario Laptop OS Windows 7 Ultimate 64 bit, Mac OS X 10.6 CPU Intel Pentium Dual Core @2.0GHz Motherboard Compaq Generic Memory 12GB Graphics Card NVIDIA Graphics For Mobile 512MB VRAM Sound Card IDT High definition Audio Monitor(s) Displays Laptop LCD Display Screen Resolution 1280*800 Bright View Widescreen
Keyboard Generic Laptop Keyboard Mouse Touch Pad Cooling Direct ; generic fan Hard Drives 500 GB Primary Master@7200rpm + 1 TB External HDD Internet Speed 3.1 Mbps wireless Broadband Other Info Generic Dock
System Manufacturer/Model Number Home built OS Windows 7 Ultimate 32 bit CPU Intel(R) Pentium(R) 4 CPU 3.00GHz Motherboard ASUS P4P800-VM Motherboard Chipset: Intel 865G + ICH5 Memory 2.50 GB RAM Graphics Card NVIDIA GeForce 7600 GS Sound Card SoundMax Integrated Digital Audio (Chip) Monitor(s) Displays ViewSonic VX 1962 wm Screen Resolution 1680 X 1050
Keyboard Microsoft Comfort Curve Keyboard 2000 v10 USB Mouse Logitec optic USB Cooling Fan based Hard Drives Seagate Barracuda 7200.10 80 GB
ST380215A ATA Device 18.6 GB
Western Digital "My Book" external hard drive 750 GB Internet Speed 3.01 Mb/s download 0.64 Mb/s upload
System Manufacturer/Model Number COMPAQ Presario Laptop OS Windows 7 Ultimate 64 bit, Mac OS X 10.6 CPU Intel Pentium Dual Core @2.0GHz Motherboard Compaq Generic Memory 12GB Graphics Card NVIDIA Graphics For Mobile 512MB VRAM Sound Card IDT High definition Audio Monitor(s) Displays Laptop LCD Display Screen Resolution 1280*800 Bright View Widescreen
Keyboard Generic Laptop Keyboard Mouse Touch Pad Cooling Direct ; generic fan Hard Drives 500 GB Primary Master@7200rpm + 1 TB External HDD Internet Speed 3.1 Mbps wireless Broadband Other Info Generic Dock
System Manufacturer/Model Number Samsung NP530U4B-S02IN OS Windows® 8 Pro (64-bit) CPU Intel® Core™ i5 Processor 2467M (1.60GHz, 3MB L3 Cache) Motherboard Samsung Electronics Memory 6GB DDR3 System Memory at 1,333MHz (on BD 4GB + 2GB x 1) Graphics Card AMD Radeon™ HD7550M 1GB DDR3 (Ext. Graphic) Sound Card Realtek High Definition Audio Monitor(s) Displays 35.56cm (14.0) SuperBright 300nit HD LED Display Screen Resolution 1366x768
Hard Drives 1TB S-ATA II Hard Drive (5400RPM) with ExpressCache 16GB SSD Internet Speed sucks Antivirus Microsoft Security Essentials Browser Google Chrome (Sync enabled)
System Manufacturer/Model Number HP HDX 18T 1100CTO/Gateway SX2000 OS Vista Spk 2 x64 Home Premium/Windows 7 Home premium CPU Laptop NVIDIA/ 22" envision NVIDIA Graphics Card NVIDIA G9600
Other Info This was made to order and since it was there is no documentation online about it.
System will only start in Safe mode, Clean virus in safe mode 
