I needed to uninstall LXLE (a Linux distro) on my laptop and use just Windows 7 instead. I read somewhere that going into the root terminal and typing sudo apt-cache show lxde and then deleting the files shown would uninstall LXLE, so I did that and rebooted. But now whenever I try to boot, I get the following error upon startup: file /boot/grub/i386-pc/normal.mod not found.  Now I need to know how I can get my computer to just launch Windows instead when I boot. Typing into the grub rescue&gt; (whatever that is...) does nothing. Please use layman's terms, I have no experience with this kind of stuff and won't understand a bunch of technical jargon.
error: file '/grub/i386-pc/normal.mod' not found. grub rescue&gt;   What can I do? I just sit and stare at it.   I found my old netbook (Dell Inspiron 1010) which I have not used for about four years. I replaced Windows XP with Ubuntu 12.10. I used my bootable USB drive. I installed and rebooted. I got the message that normal.mod is not found.   What should I do? Type exit, reboot, or quit? Should I re-install?
What is the probability that a man likes pink? Atomic clocks were used in Hafele and Keatings experiment which supposedly helped to prove time dilation.    How can we be sure other forces didn't act upon the clocks as a result of their being at different speeds and elevations? Perhaps the elapsed time may have been the same for all and only appeared different as a result of the clock's atoms behaving differently in different environments.  How might the presence of dark matter (presumably all over the place) impacted the clocks if say the dark matter is stationary relative to the earth's rotation?  What experiments have been done to test the constancy of clocks at different speeds and elevations? Changing url of exposed filter When I used an exposed filter the filter selection is passed as name/value pair in the url, for example:  members?field_a=valuea&amp;field_b=valueb   How can I set it up to use more of a "pathauto" style url:  members/valuea/valueb Prove that $x^x+y^y=z^z$ doesn't have integer solutions Antivirus software is breaking SE web page? (blocking CSS and JS)? Compress a folder with tar? I'm trying to compress a folder (/var/www/) to ~/www_backups/$time.tar where $time is the current date.  This is what I have:  cd /var/www &amp;&amp; sudo tar -czf ~/www_backups $time"   I am completely lost and I've been at this for hours now. Not sure if -czf is correct. I simply want to copy all of the content in /var/www into a $time.tar file, and I want to maintain the file permissions for all of the files. Can anyone help me out? I'm looking for a simple, easy to understand algorithm to alphabetically sort an array of characters in C. How to close ports / disable services? I just portscanned my system with nmap and got the following result:  PORT    STATE SERVICE 25/tcp  open  smtp 631/tcp open  ipp   what are these services and how i do disable them? probably i don't need them. What is the appropriate public key encryption for secure coin flipping? I quote Bobby's question here since I encountered the same one...    Consider the following protocol for two parties to flip a fair coin.   Trusted party $T$ publishes her public key $K_{pub}$ $A$ chooses a random bit $b_A$, encrypts it under $K_{pub}$, and announces the ciphertext $c_A$ to $B$ and $T$ $B$ does the same and announces a ciphertext $c_B$ (where $c_B \neq c_A$) $T$ decrypts $c_A$ and $c_B$, and announces the results. Both parties $XOR$ the results to obtain the random value $b_A\oplus b_B$.   It was shown that  was not appropriate for the encryption scheme.  seems to fail to work also. Since $c_A=m^e \mod N$. Then if $m=1$, $c=1$. If $B$ receives $A$'s cipher he will know the exact value of $m$.   So what should the appropriate encryption scheme be? Proof of Wolstenholme's theorem Differentiable but not continuously differentiable. Given $f: \mathbb{R} \rightarrow \mathbb{R}$ defined as $$f(x)=\left\{\begin{array}{cc}x^2\sin\left(\frac{1}{x}\right)&amp;,x\neq 0\\ 0&amp;,x=0\end{array}\right\}.$$ I am trying to prove $f$ is differentiable at $x=0$ but not continuously differentiable there. I just found this identity but without any proof, could you just give me an hint how I could prove it? $$2^n = \sum\limits_{k=0}^n 2^{-k} \cdot \binom{n+k}{k}$$  I know that $$2^n = \sum\limits_{k=0}^n \binom{n}{k}$$ but that didn't help me Remove Personal Options section from Profile I want to hide/remove the Personal Options in the Your Profile (wp-admin/profile.php) admin page.  I am aware that solutions for this exist, but I they use jQuery to do hide this section. This works, but when a user has JavaScript disabled in their browser, it will show up again. Therefore it is not a proper way to remove Personal Options.  Is there a way to remove the Personal Options section from the HTML source of the page? This means no jQuery or CSS hacks, or core file modification. Changing a Part of a variable within ParallelDo Is it a good concept to use multiple inheritance or can I do other things instead? Black and white beads on a circle There are $n$ beads placed on a circle, $n\ge 3$. They are numbered in random order as viewed clockwise. Beads for which the number of the previous bead is less than the number of a next bead are painted in white color,and others - in black.  Two colourations that can be made equal by rotation are considered identical. How many different colourations can occur?  I've write a programm and for $n=3...11$ I've got answers $2 , 1 , 6 , 7 ,  18 , 25 , 58 , 93 , 186$ Short story or novel from the 1970s or before about two warring alien tribes Question: If $G$ is a finite group such that the product of its elements (each chosen only once) is always $1$, independent of the ordering in the product, what can we say about $G$?  I was trying to conclude that $G$ must be abelian (I am not sure about this). I proceed as follows: if $|G|\leq 4$, then obviously, $G$ is abelian. Suppose $|G|&gt;4$. Then consider products of all elements in the order $a^{-1}b^{-1}ab cc^{-1}dd^{-1}....$. This, being identity, implies that $a^{-1}b^{-1}ab=1$, i.e. $G$ is abelian.  BUT, the problem is in $a^{-1}b^{-1}ab$, the elements $a$ and $a^{-1}$ should be distinct, and similarly for $b$. Otherwise, the product $a^{-1}b^{-1}ab cc^{-1}dd^{-1}....$ is not in the prescribed form as in question.  Also, note that the cyclic group of order $4$ doesn't satisfy that $abcd=1$ where $\{a,b,c,d\}\cong \mathbb{Z}_4$. Function pointers/delegates in Java? For my Java game server I send the Action ID of the packet which basically tells the server what the packet is for. I want to map each Action ID (an integer) to a function. Is there a way of doing this without using a switch? Reading a 5 Band resistor with Gold as a middle band? Can anyone read the resistor that the arrow is pointing to?  From what I know you can not have a gold band as a number and if I am reading it correctly it has a tolerance of 0 which does not seem right.