My failures: What is my computer skills

I am the one who studied the operating systems deeply, and the one who always tried to figure out, why the problem isn't working. It seems like deep knowledge of operating systems would only help me on regular daily business basis, but it doesn't. Here's the internal problems I faced while I tried again to fix the laptop with Windows 7 for someone:

• Absence of resources: 
• without external HDD there was no way to save customer's data
• without an external hotplug SATA HDD connector there was no way to do it even quicker by plugging laptop's hard drive into it
• it wouldn't be possible to install an OS on that laptop without the portable usb DVD/CD drive since this laptop hasn't accepted the usb sticks as bootable
• Absence of empty DVD-R's to record an Windows 7 operating system on them.
• Absence of ready to use Windows 7 installation DVD-R - absence of which would be close to worst possible scenario in time management
• Absence of organizational skills:
• Installing an operating systems for someone else requires some dedication - you can't just leave an operating system alone on some process - each processes must be controlled. I believe even in the physical world if you will hand the processes to someone else without control its not really guaranteed that things will meet deadlines. So lesson learned here is keeping a laptop close to me so that screen was always before my eyes and if something else goes wrong I should see it immediately to respond in a quickest possible way
• Installing an operating system could be a long process, especially when customer brings his computer because it didn't worked well for him. Today people bring their computers to customer services, because something is really broken in terms of software.
• Setting a deadline shorter than you really have time: approximately 10 times shorter - You should remember that if you're installing an operating system, the problem might occur in the installation middle after an hour of the process, so its better to make sure that you have enough time even for waiting 10 windows installation setups in case if every of 10 times would be failure.
• Customer's who's too much hurrying up with their laptops must pay fee for urgency, that's because you must always know how much you're getting in case of there's will be a problem with a deadline.
• DON'T PREDICT. In the computer repairs its impossible to predict how much time will be spent on a particular repair service - this contradicts the quality itself, since any professional individual must count work as done, when it done qualitatively.

Solutions:

• Having full repair set to possibly fix everything you'll get on a way to successful laptops repairment
• Refusing from URGENT customers
• Setting shorter deadlines during work
• Providing full attention when the software installation process requires
• Not taking work for a night - you must sleep at nights. Always plan your schedule the way you will do the job during the daytime.
• And the main solution and failure are that I managed to get to the level where I'm performing this computer fix job myself, except for doing my main managerial job which is about doing something repetitive by discipline in order to achieve necessary wholesale volumes of sales.
• agent volumes pecifix
• my best [tested] disruptive factors is YouTube, facebook, blogger. Least disruptive factors is Amazon Kindle